Role of shape on the forces on an intruder moving through a dense granular medium. (18th August 2022)

• Record Type: Journal Article
• Authors: Tripura, Bitang Kwrung; Kumar, Sonu; Anki Reddy, K.; Talbot, Julian
• Is Part Of: Particulate science and technology. Volume 40:Number 6(2022)
• Page Start: 651
• Page End: 661
• Publication Date: 2022-08-18
• Subjects: Granular medium -- intruder shapes -- drag and lift forces -- discrete element method; Particles -- Periodicals; 620.43
• DOI: 10.1080/02726351.2021.1983905
• Languages: English
• ISSNs: 0272-6351

Abstract

Abstract: We use numerical simulation to investigate the effect an intruder's shape has on the drag and lift forces that it experiences while moving through a granular medium composed of polydisperse disks of mean diameter d . The intruder velocity, v, was varied from 0.1 d g to 20 d g . For frictionless particles ( μ = 0.0 ), there is a gradual increase in drag force with increasing v, whereas, for frictional systems ( μ = 0.1, 0.5 ), a constant drag regime appears at low velocities. The drag force depends weakly on the object's shape provided that its cross-section is constant. The drag force depends linearly on the immersion depth, while the lift force varies weakly with depth for certain shapes. The lift experienced by the object is a strong function of its shape at a given velocity. The shape has an effect on the distribution of contacts around the surface of the intruder, which may result in a strong lift for certain shapes. We also present and discuss the force profiles around the intruder surface.